Question I (a) List and briefly explain the four components of the discipline of materials science and engineering in a linear relationship. (b) Using a flowchart, classify engineering materials, indicating the types of polymers. 141 (e) Determine the Miller indices for the directions in the cubic unit cell shown below (Fig. Q1): 181 B D A y Fig. QI (d) BCC lithium has a lattice parameter of 3.5089 x 10-10 m and contains one vacancy per 200-unit cells. If the atomic weight of lithium is 207.19 g/mol and Avogadro's number is 6.02 x 102, Calculate: Question 2 (i) the number of vacancies per cubic metre and (ii) the density of lithium. (a) For a HCP crystal structure, show that the ideal c/a ratio is 1.633 [8] [3] [4] (b) Rhenium has an HCP structure, an atomic radius of 0.137 nm, and a c/a ratio of 1.615. Find the volume of the unit cell for Rhenium, if the base area of an HCP crystal structure is 6R²√3 [7] (c) The weights of the individual constituents of an alloy are 45,224 g of copper, 46,267 g of zinc and 953 g of lead. Find the composition, in atomic percent, of the alloy, if the alloy contains no other alloying elements. [Atomic weight of copper = 63.55 g/mol; atomic weight of zinc 65.41 g/mol; atomic weight of lead = 207.2 g/mol; Avogadro's number 6.023 x 1023 atoms/mol]. [5] (d) A cylindrical rod of copper having a yield strength of 240 MPa is to be subjected to a load of 6660 N. If the length of the rod is 380 mm, find the necessary diameter to allow an elongation of 0.5 mm. [E 110 GPa]. [5] Question 3 3

A number of elements along with their crystal structures and atomic radii are listed in the following table. Which pairs might be expected to have complete solid solubility in each other? Crystal Atomic Crystal Structure Atomic Structure radius (nm) radius (nm) Silver Palladium FCC 0.144 Lead FCC 0.175 FCC 0.137 0.137 Tungsten Rhodium ВСС Copper Gold FCC 0.128 FCC 0.134 Platinum Tantalum FCC 0.144 FCC 0.138 Nickel FCC 0.125 ВСС 0.143 Aluminum Sodium FCC 0.143 Potassium ВСС 0.231 ВСС 0.185 Molybdenum ВСС 0.136

Vanadium (V) has a BCC crystal structure. The atomic radius is R = 0.132 nm and the atomic mass is M = 50.94 g/mole. What is the density of Vanadium in g/mm3? Given: Avogadro’s Number NA = 0.6023 × 1024 (atoms/mole) Select one: a. 1.5 b. 0.021 c. 0.011 d. 0.0087 e. 0.00597

Need help on this Q.

Sodium chloride (NaCl) has the rock salt crystal structure and a density of 2.17 g/cm³. The atomic weights of sodium and chlorine are 22.99 g/mol and 35.45 g/mol, respectively. (a) Determine the unit cell edge length. nm (b) Determine the unit cell edge length from the radii in the table below assuming that the Nat and Cl- ions just touch each other along the edges. nm Cation Mg2+ Fe2+ Na+ Ionic Radius (nm) 0.072 0.077 0.102 Anion Ionic Radius (nm) CI- 0²- 0.181 0.140

Solve this problem and show all of the work

Hi, I have a materials engineering question.

Help me please

Qd 132.

A metal crystallizes in the face‑centered cubic (FCC) lattice. The density of the metal is 1202012020 kg/m3, and the length of a unit cell edge, ?a, is 389.08389.08 pm. Calculate the mass of one metal atom. mass: gg Identify the metal. platinum gold silver palladium